Paper-bag machine.



w. A. LORENZ. PAPER BAG MACHINE. APYLIOA'IIOH FILED OCT. 13,1900.

5 sums-533m 4..

5 C0" WASHINGTON,- D C,

from the defining edge, so as to maintain WILLIAM A. LORENZ, or HARTFORD,

PAPER BAG MACHINE CONNECTICUT, ASSIGNOR TO UNION COMPANY, OF PHILADELPHIA, PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA.

PAPER-BAG lVlACHlNE.

Application filed October 19,

To all whom it may concern:

Be it known that 1, WILLIAM A. LORENZ, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Paper-Bag l Machines, of'which the following is a full, clear, and exact specification.

This invention relates to paper-bag machines, and more especially to that class thereof in which square bottom bags are l formed from bellows-sided or tucked tubing; '1 and it has for one of its objects the provision of a machine, whereby the so-called diamond fold is formed while the sides of the tube are maintained in a separated or open condition, preparatory to having its flaps supplied with paste and subsequently folded to complete the bag.

My invention includes as one of its features a blank-folding member having a bottom defining edge cooperative with a suitable blank carrier or support and adapted to open the blank or tube to the required extent, the blank-folding member and the carrier being maintained in proper relationship to each other, so as to form the diamond fold in an easy and rapid manner.

While in the present instance the blankfolding member has an oscillatory movement in its support, the blank-carrier is of the shiftable type controlled and positioned by a suitable mechanism, so that as the defining edge of the blank-folding member turns upon its supporting axis the blanksupport ing surface of the carrier will be shifted away proper separation of the sides of the tube or blank.

My invention therefore includes a rotata- Specification of Letters Patent.

1900. Serial No. 33.599.

ble blank-carrier cooperative with an oscillatory blank-folding member, and having a shift'able axis to preserve the proper separation between the defining edge and the blankl supportin surface of the carrier during the diamond orming operation.

The blank-carrier is preferably of the rotary ty e and proper movement is imparted to the blank-folding member to permit the l defining edge to travel forward in unison with the blank-s11 pporting surface of the carrier' during the diamond-forming operation, and in order to gain more tune during this I Patented March 12, 1907.

period the pivot-support of the blank-folding member is caused to advance with the blankreceiving surface of the carrier. This gain of time is chiefly due to the organization of the device which carries the blank-folding member, the latter being mounted for movement bodily with the carrier, and consequently adapted for cooperation therewith for a greater are or a greater linear travel of the blank-supporting surface of the carrier than is possible when the support of the folding member is stationary. My invention therefore includes an improved carrier for the blank-folding member, said carrier being pivoted on a fixed axis and adapted to carry the member bodily inthe direction of the movement of the blank-carrier during the diamond-folding operation.

A further object of myi'nvention may be found in the combination with an oscillatory blank-folding member which is pivotally supported in an advanceable carrier therefor, of a rotatable blank-carrier having a shiftable axis, so that as the defining edge of the blank-folding member is caused to ad vance in unison with the blank-supporting surface of the carrier during its forward stroke the blank-carrier itself moves toward and from the defining edge.

While generally a blank-folding member mounted in accordance with my inventionviz., in a carrier which is advanceable with the blank-carrier-may be advantageously employed where the blank-carrier and the defining edge travel in close contact with each other during the working stroke, yet I consider that it is a matter of great impor tance to maintain the definin edge of the blank-foldin member at a substantial dis tance from tie blank-support, so that as the latter and the blank-folding member coact in opening out the end of the blank the socalled inside triangular folds may be easily developed by stretching out the tucked sides of the tube or blank.

In the accompanying drawings, in which similar characters designate similar parts, Figure 1 is a top view of a paper-bag machine constructed in accordance with my invention. Fig. 2 is a vertical section of the same taken on line 2 2, Fig. 1. Fig. 3 is a similar section taken on line 3 3, Fi l 1. Fig. 4 is a side view of the machine 100 g from the left of Fig. 2. Fig. 5 is a fractional side view of the blank-carrier, illustrating the relative positions of said carrier and the blank-folding member after a blank or bag 5 len th has been introduced into the machine an gripped. Fig. 6 is a side view of the carrier and the folding member, showing the parts in position when the end of the tube has been opened out sufliciently to form what to is ordinarily called the box and the inner triangular folds of the blank. Fig. 7 is a top view corresponding to Fig. 6. Fig. 8 is a view similar, to Fig. 6, illustrating the parts in position after the diamond has been subi 5 stantially completed; and Fig. 9 is a top view corresponding to Fig. 8.

Inthe accompanying drawings, 10 designates the bed-plate of a machine to which are secured upright side frames 11 and 12,

2 in which the several cooperating shafts for driving the various devices are supported. Suitable means are provided for feeding blanks or bellows-sided tubing into the machine, such means consistin in the present 2 5 instance of suitable feed-r0 lers l3 and 14,

mounted on shafts 15 and 16, respectively,

the former being journaled in movable boxes 17 (see Figs. 1 and 4) acted upon bysuitable springs. (Not shown.) The feed-rollers are 0 caused to cooperate with each other by means of gears 18 19, mounted on said shafts 15- and-16, the latter of which carries a gear 20, obtaining motion from a similar gear 21, secured to a shaft 22, which constitutes the 35. main driving-shaft of the machine.

' From the feed-rollers the blank or tube is conducted to a suitable blank support or carrier for receiving and holding the blank during the bottom or diamond forming operation. Connected for cooperation with the carrier is a blank-folding member adapted for engaging the upper ply or tube of the blank, while the carrier is provided with means whereby the lower ply of the blank is securelyheld inplace, both carrier and blank-folding member coacting to open out the end of the blank and form the diamond, as will hereinafter appear. The carrier is in this instance of the rotary type and consists substantially of a cylinder 23, mounted upon a shaft 24, journaled in apair of arms 25, which are connected at their lower ends by a sleeve 26, so as to form a unitary structure. The sleeve 26 is loosely mounted upon .55 the shaft 22 above mentioned and carries at one end thereof an arm 27, which carries at its free end a cam-roller 28, adapted for engagement with a cam 29, whereby proper "oscillatory movement may be imparted to 60 the arms 25, which support the carrier 23, as

above stated. The carrier receives its rotary movement in this instance through a gear 30, secured to the shaft 22, and in engagement with the carrier-gear 31, secured to the 65,shaft 24, and

said gear 30 is also in mesh.

with an intermediate 32, which is driven from a pinion 33, mounted upon the shaft 34, which constitutes the main cam-shaft of the machine and upon which the abovementioned cam 29 is secured.

The means for holding the lower ply of the tube on the carrier consist, preferably, of a pair of spring-operated tuck-holders 35, journaled at 36 on the carrier and carrying cam rollers 37, which are adapted to travel around the periphery whereby the tuck-holders are caused to grip the blank on both sides simultaneously and at the proper time. The carrier 23 is also provided with a device for gripping or holding the front end of the lower ply of the tube or blank, this device being shown as a front diamond-holder 39, journaled at 40 on the carrier, and carrying a roll 41 in engagement with a cam 42, whereby as the carrier rotates said holders 39 will be caused to release the blank at a certain time, while a spring 43 may be employed for closing said holder over the lower ply of the blank.

Connected for cooperation with the blank support are blank-folding devices or mechanism including a member for engaging the upper ply of the tube or blank and means for securing said ply against said member, said member being herein illustrated as a plate 44,

one edge, as 45, of which serves as abottomdefining edge and which is mounted for oscillation in a carrier comprising a pair of arms 46, which in their turn may be mounted for oscillation upon studs 47. Each of the arms 46 is in this instance pivotally connected to a link 48, the lower end of which is attached to an arm 49, both of said arms 49 being connected to move in unison by a sleeve 50, which carries an arm 51, having a cam-roller 52 in engagement with a cam 53, whereby proper oscillatory movement may be imparted to the above-mentioned arms 46, so as to cause the pivot-support of the blankfolding member to advance in the direction of travel of the blank-carrier during the dia mond-forming operation. Means are provided whereby the blank-folding member 44 is oscillated in its support, and the oscillatory movement of said member is so timed in connection with the mechanism whereby the arms 46 are oscillated at their point of support that the'defining edge 45 will move in unison with the carrier du'rin the forward stroke thereof. The means for oscillating the blank-folding member in its support consists, preferably, of sectors 54, loosely journaled on the studs 47 and connected by means of links 55 with arms 56,- which are secured u on a shaft 57, j ournaled in the side' frames 0 the machine. This shaft carries also an arm 58, engaged by a cam 59, Whereby the sectors 54 oscillatory movement to a'pair of pinions in engagement therewith, said pinions being of suitable cams 38,

ITO

ITS

are rocked to impart an directly connected to the trunnions 61, forming the pivot-journals of the b1ank-folding member.

The means whereby the upper ply of the blank is secured to and held on the blankfolding member consist in the present in stance of box-holders pivoted in extensions 63 of the blank-folding member and having tailpieces 64 to beengaged for opening the holders at the blank-receiving end of the stroke by abutments 65, which are preferably movable and pivotally supported on a spindle 66, held in the side frames. The spindle 66 is provided with an arm 67, which carries a cam-roller 68 in engagement with a cam 69, which may be mounted upon the feed-roll shaft 15. The box-holders may be operated to close against the plate 44 by a suitable spring, such as 7 O, connectedwith both holders. (See Fig. 1.) The means provided for o ening the box-holders in order to release the lank at the end of their working stroke, which position is indicated by Fig. 8, consist in this instance of cam-arms 71, securedto the bearings formed at the outer ends of the carrier-supporting arms 25. (Figs. 2 and 4.) It has also been stated above that the blank-folding member and the blankcarrier shouldbe maintained in proper relationship to each other, so as to form the diamond fold in an easy and rapid manner, the defining edge of said member and the blanksupporting surface of the blank-carrierbeing caused to follow separated paths'during the diamond-folding operation. I therefore employ for coperation therewith a blankcarrier having a shiftable axis, so that the proper distance between the defining edge and the blankcarrying surface of the carrier be maintained, while'the said carrier and said member coact in opening out the open end of the bag-blank and in developing the so-called inside triangular folds by stretching out the tucked sides of the tube or blank. In order to vary the shifting movement of the blank-carrier axis relative to themovement of the defining edge, the cam 29, whereby said axis is shifted to maintain a proper separation of the tucked tube sides, may be changeable to suit the different requirements of different thicknesses and kinds of material from which the bags are to be made.

Interposed between the feed-rolls 13 14 and the carrier 23 is a guide plate 72, whereby the blank as it is fed forward by the feedrolls will be guided with its front end between the foldin member and the carrier.

J ournaled in t e side frames and near the upper ends thereof is. a shaft 73, carrying a cam 74 in engagement with a roll 75, journaled on a lever 76 for operating the droplate, whereby the diamond will be flattened. he arm 76 is secured to a shaft 77, which also carries an arm 78, at the free end of which the drop-plate79 is secured. It will therefore be evident that a rotation of the shaft 73 will result in operating the dropplate toward the blank-carrier and against the action of a spring, such as 80, whereby said droplate is again raised.

When t e diamond has been flattened by the drop-plate, the bag maybe carried by the blank-carrier into contact with a pester-roll 81, mounted on the shaft 73, which may re ceive its rotary movement through a ear 82, held on said shaft 73 and meshing wit an intermediate 83, journaled on a stud which is held in the side frame 12, while the intermediate 83 is in turn engaged by a gear 84, se-

cured to the driving-shaft 22, above mentioned.

Secured to the sleeve 26 of the blank-carrier rocking device is a U-shaped bracket 85, in the arms of which is journaled a shaft 86, carrying a presser-roll 87 and having a gear 88 in engagement with the carrier-gear 31. The pinion 88 in its turn drives a pair of delivery-rolls 89 and 90, mounted upon shafts 91 and 92, respectively, which are also journaled in the arms of the bracket 85 and which may carry gears 93 and 94, respectively, the former of which may be driven from the pinion 88 through the intervention of an intermediate 95. A delivery-plate 96 may be disposed betweed the presser-roll 87 and the delivery-rolls 89 90.

The operation of my improved machine is as follows: Bellows-sided or tucked tubing is introduced into the machine by the feed-rolls 13 14 and guided by the guide late 72 into position between the blank-fol ing member 44 and the carrier 23 in such a manner that the tuck-holders 35 and the front diamondholder 39 will engage the lower ply of the blank, as seen in Figs. 3 and 5, and will thus be carried along by the carrier in the direction of the arrow. While the blank is delivered to these holders, the box-holders 62 of the blank-folding member 44 are open, and

the movement of the blank-folding member with the box-holders is so timed that the front edges of the tuck-holders and the box holders come into alinement with each other, at which time both tuck-holders and boxholders will close on the blank sides, and then the carrier and the defining edge 45 of the blank-folding member will travel in unison during the formation of the diamond. While the defining edge 45 of the blank-folding member is traveling in unison with the blankcarrier, the pivot-axis of the blank-folding member is also advancing in the direction of travel of the carrier, and at the same time an oscillatory motion is imparted to said folding member, this motion resulting in opening out the 0 en end of the tube or blank, as shown in igs. 6 and 7, and then to the posi tion shown in Figs. 8 and 9. During this time the blank-carrier is at first shifted bodily away from the defining edge to maintain the guide the blank toward t and 90 and subsequently to flap vices, (not shown,) there to be into the completed bag. After the boxholders have released the bla member will remain in the po Fig. 8 until the blan ward to clear the b said folding member will to its normal position, (se carrier being cut away su so as to afford room for swing clear of and to required separation betwe and it is then shifted bac edge, as shown in Figs. 8 ings, when the inside trian en the tube sides, ing back the ply of a bag-blank carried by k to approach the the support, a movable carrier for pivotally and 9 of the drawsupporting said folding member and means gular folds have for shifting the axis of the blank-support to been fully developed and the diamond has ward and away from said folding member.

been substantially completed. At this time 4. The combination, with a rotatable the drop-plate is forced downward to flatten blank-support having a shiftable axis and the diamond and the box-holders are caused provided with tuck-holders, of a foldingto release the blank, which is now carried unplate provided with means including a definder the roller 81 and under the presser-roll ing edge for engaging and turning back the 87, after which the delivery-plate 96 will ply of a bag-blank carried by the support, a

with the carrier.

It is evident that made in the particul ganization of the el machine without (1 my invention.

he delivery-rolls 89 movable carrier pivotally supporting said -folding deplate, and means for supporting said carrier transformed for swinging movement.

5. The combination with a rotatable nk the folding blank-support having a shiftable axis and sition shown in provided with tuckholders, of a foldingk has been drawn forplate provided with means including a definholders, whereupon ing edge for engaging and turning back the immediately return ply of a bag-blank carried by the support, s Fig. 5,) the blankmovable arms pivotally supporting said foldfficiently, as shown, ing-plate, and means for swinging the said the defining edge to arms in the general direction of travel of the prevent interference blank-support.

6. The combination, with a blank-support many changes may be having a shiftable axis and provided with ar construction and ortuck-holders, of a folding-plate having boxements of my improved holders and a defining edge, a plate-carrier eparting from the gist of having a fixed pivotaxis and supporting the said plate for swinging movement, and means In my copending applications, Serial Nos. for swinging the said folding-plate in its car'- phoations.

.Having described In claim as new, and ters Patent, 1s

1. The combination, with a blank having a shiftable axis and provi tuck-holders, of a folding member with means including a defining ed gaging and turning back the ply blank carried by the said su movable carrier for pivotally supporting said folding member.

2. The combination, port having a shiftabl with tuck-holders, of a vided with means includin engaging and turning bac blank carried by the support, a

1900,. 32,123, filed 6, filed November 1, November 12, 1900, I ovel improvements in e shown and described application. This apo be understood as besaid copending applicain common the d in said copending apy invention, what I desire to secure by Letsupport ded with provided ge for en of a bagpport, and a with a rotatable supe axis and provided lding member prog a defining edge for ply of a bagnd a movable rier.

7. The combination, with a blank-support having a shiftable axis and tuck-holders, of a folding-plate having box-holders and a defin ing edge, a plate-carrier supported on a fixed pivot-axis and supporting the folding-plate for swinging movement, and gearing for swinging the plate. v

The combination, with a blank-support having a shiftable axis and having tuckand a defining edge, a folding-plate carrier supported on a fixed ivot-axis and pivotally supporting the said folding-plate, and a ogm-operated sector for swinging the said ate. p 9. The combination, with a blank-support having a shiftable axis and having tuckholders, of a folding-plate having box-holders and adefining edge, a plate-carrier supported on a fixed pivot-axis and pivotally supporting the said folding-plate, and a sector eccentrically pivoted relative to the blank-support axis for swinging the said folding-plate on the carrier.

10. The combination, with a rotaryblanksupport journaled in movable bearings and having tuckholders, of a member having carrier pivotally supporting said folding box-holders and a defining edge, means for member.

3. The combination, with a rotatable vancing the said folding member with the moving the said bearings, and means for ad- 'th tuck-holders, blank-support. ed with means in- 11. The combination, with a rotatable and turnblank-support having a shiftable axis, of a ICC holders, of a folding-plate having box-holders foldin member provided with means including a defining edge for folding back the ply of a bag-blank carried by the support, and means for shifting the said axis to separate the surface of the blank-support from the said defining edge during the folding-back operation.

12. The combination, with a rotatable blank-support having a shiftable axis, of a foldin member provided with means including a defining edge for folding back the ply of a bag-blank carried by the support, means for moving said edge forward in unison with the blank-support during its folding-back movement; and means for shifting the said axis to separate the surface of the blank support from said defining edge during said folding-back operation.

13. The combination, with a blank-support having tuck-holders, of movable arms supportin the said blank-support for rotation, a folding member having means includin a defining edge for folding back the ply of a ag-blank carried by the support, and means for movin said arms to separate the surface of said b ank-support from the said defining edge during the folding-back operation.

14. The combination, with a blank-support having tuck-holders, of movable arms supporting said blank-support for rotation, a foldin member provided with means includin a defining edge for folding back the ply of a bag-blank carried by the support, and a cam for moving said arms to separate the surface of the blank-support from the defining edge during the turning-back operation.

15. The combination, with a rotatable blank-support having tuck-holders, movable arms for supporting said blank-support, a folding member having a defining edge and box-holders, means carried by said arms for opening the box-holders, and means for moving the arms to carry the surface of the blanksupport a substantial distance away from said defining edge during its operation.

16. The combination, with a rotary blanksupport havin a shiftable axis and provided with tuck-1101 ers, of a folding member provided with means including a defining edge for folding back the ply of a bag-blank carried by the support, means for shifting the axis of the blank-support to carry its surface a substantial distance away from the defining edge during the folding-back operation, and means for advancing the folding member in the direction of travel of the blanksupport during the said folding-back operation.

17. The combination, With a rotary blanksupport having a shiftable axis and provided With tuckholders, of a foldin late provided with means including a de ning edge for folding back the ply of a bag-blank carried bythe support, a movable carrier supporting the said folding-plate for swinging movement, means for shifting the said axis to separate the surface of the blank-support a substantial distance from the defining edge during the folding back operation, and means for advancing the plate-carrier in the general direction of travel of the blank-support during the said operation.

18. A rotary blank-support constituting a folding-bed, means for holding the lower plies of successive blanks on the blank-sup ort, a folding-plate provided with means inc uding box-holders for folding back the upper ply of the successive blanks, an arm pivotally supporting the said plate and mounted for oscillation upon an axis located in eccentric relation to the circle of rotation of the blanksupport, means including a sector for oscillating the folding-plate upon its pivot-axis, and means for oscillating the arm to move the said axis of the folding-plate forward relative to the direction of movement of the blank-support.

19. A rotating blank-support constituting a folding-bed, means for holding the lower plies of successive blanks upon the support, a blank-folding plate provided with means including box-holders for folding back the upper plies of the successive blanks carried by the support, a platecarrier mounted for swinging movement on an axis located eccentric t0 the circle of rotation of the blank-carrier, means for swinging the plate-carrier on its axis, and means including a sector-gear for swinging the folding-plate upon the platecarrier.

WILLIAM A. LORENZ.

Witnesses:

CHAs. F. SoH ELz, NELLIE PHOENIX. 

